Concentrated Platinum‐Gallium Nanoalloy for Hydrogen Production from the Catalytic Steam Reforming of Ethanol. Issue 1 (13th December 2022)

• Record Type: Journal Article
• Authors: Yadav, Mohit; Szenti, Imre; Ábel, Marietta; Szamosvölgyi, Ákos; Ábrahámné, Kornéli B; Kiss, János; Zsolt, Pap; Sápi, András; Kukovecz, Ákos; Kónya, Zoltán
• Is Part Of: ChemCatChem. Volume 15:Issue 1(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-13
• Subjects: Platinum-gallium catalyst -- MCF-17 support -- ethanol steam reforming -- DRIFTS; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.202200717
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: The steam reforming of ethanol (SRE) is a key process for the production of H2 and other vital hydrocarbons. The present work describes the synthesis of Platinum‐Gallium (Pt−Ga) nanoalloys supported on mesostructured cellular foam (MCF‐17) via ultrasound‐assisted impregnation method. Ga was substituted with Pt in different wt.% i. e. Pt/MCF‐17, Pt99.9 Ga0.1 /MCF‐17, Pt99 Ga1 /MCF‐17, and Pt90 Ga10 /MCF‐17 and was evaluated towards the SRE at a temperature range of 473K‐773 K towards hydrogen (H2 ), acetaldehyde (CH3 CHO), diethylether (DEE), ethylene (C2 H4 ), carbon monoxide (CO), carbon dioxide (CO2 ), methane (CH4 ), and ethane (C2 H6 ). The SRE activity and H2 formation rate with Pt90 Ga10 /MCF‐17 catalyst were observed to be 68.1 % and 3047.2 nmole g −1 sec −1, which is 9.8 and 4.5 times more than the Pt/MCF‐17 counterparts. Moreover, as observed from DRIFTS, NH3 ‐TPD and XPS studies Ga showed high interaction with Pt in the electron deficit state which resulted in the increased dehydrogenating and acidic properties that resulted in a higher yield of H2 . Abstract : Bimetallic nanoalloy : Establishment of a bimetallic PtGa nanoalloy supported on MCF‐17 for SRE study at varying temperatures. Higher concentration Ga resulted in the highest formation rate of H2 (3047.2 nmol g −1 sec −1 ). Ga in electron deficit state in the Pt90 Ga10 /MCF‐17 enhanced acidity and dehydrogenating properties, which resulted in the highest ethanol conversion of 68.1 % at 773 K. DRIFTS study opened up new a pathway mechanism for the formation of DEE and H2 .